Journal: Nature Communications

Article Title: Multicolor ultralong phosphorescence from perovskite-like octahedral α-AlF 3

doi: 10.1038/s41467-022-33540-1

Figure Lengend Snippet: a excitation- phosphorescence emission mapping of AlF 3 (delay time: 40 ms); b time-resolved emission spectra (TRES, λ ex = 280 nm) of AlF 3 ; c lifetime decay profiles of phosphorescent emission excited at 280, 355, and 390 nm, respectively; d photographs taken under different excitation (250 to 430 nm) off and afterglow emission images excited at 290, 350 and 390 nm, respectively (the excitation-dependent afterglow can be observed in the excitation range from 250 to 510 nm at room temperature condition); e CIE coordinates of AlF 3 phosphorescence under different excitation (250 to 370 nm).

Article Snippet: Phosphorescence spectra were collected on HORIBA FluoroMax-4P with a delay time of 40 ms. For the temperature-dependent emission spectra, a model Optistat CF2 liquid nitrogen chamber (Oxford Instruments) was used and coupled with the FluoroMax-4P spectrofluorometer.

Techniques:

Journal: Nature Communications

Article Title: Multicolor ultralong phosphorescence from perovskite-like octahedral α-AlF 3

doi: 10.1038/s41467-022-33540-1

Figure Lengend Snippet: a , schematic diagram of chemical structure of AlF 3 and engineering of the octahedral basic unit; b and c , relative phosphorescence intensity and lifetime decay profiles (λ ex = 280 nm) of the phosphorescence emission at 456, 480, 446 nm of AlF 3 , KAlF 4 , and (NH 4 ) 3 AlF 6 , respectively; d , e , relative phosphorescence intensity and lifetime decay profiles (λ ex = 280 nm) of the phosphorescence emission at 456, 486, 450, 496 nm of AlF 3 , AlCl 3 , Al(OH) 3 , and AlBr 3 , respectively; f , g , relative phosphorescence intensity, and lifetime decay profiles (λ ex = 280 nm) of the phosphorescence emission at 486, 468, 460, 500 nm of AlCl 3 , InCl 3 , CdCl 2 , and Ga 2 O 3 , respectively; and h , summary of the diverse crystalline structures of the luminescent comprising BX 6 octahedra. Error bars represent standard deviation ( n = 3).

Article Snippet: Phosphorescence spectra were collected on HORIBA FluoroMax-4P with a delay time of 40 ms. For the temperature-dependent emission spectra, a model Optistat CF2 liquid nitrogen chamber (Oxford Instruments) was used and coupled with the FluoroMax-4P spectrofluorometer.

Techniques: Standard Deviation

Journal: Nature Communications

Article Title: Multicolor ultralong phosphorescence from perovskite-like octahedral α-AlF 3

doi: 10.1038/s41467-022-33540-1

Figure Lengend Snippet: a Absorbance and phosphorescence spectra (λ ex = 280, 350, and 390 nm, respectively.); b Normalized PL spectra (λ ex = 250 nm, the dotted line was measured without long pass filters, while the dashed line with 341 nm long pass filter placed at the emission exit); c lifetime of AlF 3 monitored at 336 nm (λ ex = 280 nm); d plot of PL intensity as a function of excitation power density (λ ex = 405 nm); e plots of FWHM and intensity of phosphorescence as a function of temperature (λ ex = 280 nm; delay time: 40 ms).

Article Snippet: Phosphorescence spectra were collected on HORIBA FluoroMax-4P with a delay time of 40 ms. For the temperature-dependent emission spectra, a model Optistat CF2 liquid nitrogen chamber (Oxford Instruments) was used and coupled with the FluoroMax-4P spectrofluorometer.

Techniques:

Journal: Nature Communications

Article Title: Multicolor ultralong phosphorescence from perovskite-like octahedral α-AlF 3

doi: 10.1038/s41467-022-33540-1

Figure Lengend Snippet: a illustration of the testing paper coated with AlF 3 ; b a beam of UV excitation irradiated on the testing paper; c AlF 3 -testing paper phosphorescence demonstration after ceasing 365 nm excitation; d multicolor phosphorescence from the AlF 3 -tesing paper after ceasing a series of UV excitation; e color chart of UV wavelength testing paper.

Article Snippet: Phosphorescence spectra were collected on HORIBA FluoroMax-4P with a delay time of 40 ms. For the temperature-dependent emission spectra, a model Optistat CF2 liquid nitrogen chamber (Oxford Instruments) was used and coupled with the FluoroMax-4P spectrofluorometer.

Techniques: Irradiation